These pants are great for any shape and at any length.

Step 1: Supplies

I am using a king size sheet and any pant pattern

Sewing machine

Thread and bobbin

Scissors

Marking chalk

Iron & ironing board

Tape measure

Long straight edge

Pins

Two D-rings

2” strip of sew of Velcro

Need

Hip and waist measurement

Desired pant length

Step 2: Iron Fabric

Fabric should be pre-washed to avoid any shrinking.
With most cottons, use the steam setting to get out all wrinkles.

Step 3: Lie Out Fabric

Lie out fabric two layers, right sides together:
You want to use the finished edges of the sheet to your advantage.
I use the bottom of the sheet for the hem, and the side of the sheet for the back because back will be on top with a finished edge.

If you use the top of the sheet for the hem the pattern might be upside down and the hem would be 3 or 4 inches wide.

Step 4: Mark Hip Width

Take hip measurement; mark this for the width of the fabric.
When using common fabric you can only get 45" wide.
I would finish all sides of the fabric first if you are not using a finished sheet.

Step 5: Mark Center

Mark center of fabric.
If you prefer, on your second pair of pants you can move the center over towards the front. This will give you more of a wrap around the back. Or move it towards the back for more wrap around the front.

Step 6: Place Pattern

Place pattern with back hip on the left side towards the finished edge of the fabric and crotch at center mark.
Place front pant leg so that the front crotch touches the back crotch.
Make sure bottom of pant legs are flush with bottom hem of fabric.

If you are making knee length pants mark a perpendicular line to the grain line on the pattern where you want the length to be.

Step 7: Mark Top of Pattern

Mark a straight line perpendicular from the right edge of fabric touching the high point of pattern piece
(this point may vary depending on pattern used).

Step 8: Mark Crotch Curve

Trace crotch up to perpendicular line.

Step 9: Cut Out Pattern

Cut out the right side you marked as the hip width, the top and the crotch curve.

Step 10: Sew Crotch Seam

Sew crotch seam. I use my presser foot as a guide for the seam allowance. You can pink the seam allowance, if you prefer.
Normally I use an over lock stitch then seam, but may people do not have a serger.